Well pump



April 21, 1942. wg/BRAUE 2,280,279

- WELL PUMP` Filed June 29, 1940 2 Sheets-Sheet 2 a deep well `readily guided Vin roller not be subjected to elongation dueto reciprocasucker rods` f and the ously with the natural. flow; of iluid Patented Apr. 21, 1942 WELLPUMP Walter Brauer, Oklahoma City, Okla. Application June 29, 1940, serial No. 343,221 3 claims. (c1. 10ai551` This invention `relates to improvements in deep well pumps and more particularly, but not by Way of limitation, to `an improvement` in a rotary pump of the type shown in my prior Patent No. 2,171,171, `issued on August 29,' 1939. An important object of this invention is to provide a pump which may be driven from the toplofa well, and the construction is such that he pump can be put on tubing, run inthe well and set withthe tubing catcher. A string of rods can then be lrun through the tubing to provide a `driving connection with4 the rotor of the pump.

A` further object of the invention is to provide pump which can be operatedy by ro'- tating the suckerrods,` and as such rods may be bearings, `the rods will `tion thus elimination rodincident thereto. n using sucker rods,` it will be apparent that any suitable string such as Vtubingjcable orthe like,

stretch and breakage While the invention is shown` a` compact pump whichcan be used inilsmaller sized casing, and of .such `construction that al1 parts run in oil at al1 times. j

Other objects and advantages of the invention will be evident-,from the following detailed description read in conjunction with the accompanying drawings which illustrate onetform of my invention. i

' I -In the drawings: j

, Fig. 1 is a fragmentary vertical sectionalview partly in elevation of the `upper portion of the n 1 l Fig. 1A is a similar view ofthe lower portion of the pump. l l l f d l Fig. 2 is a vertical sectional Viewl of the lower l portion cfa well showing my improvedpump dismay be employed to rotate the rotor of the pump. 4

` An` additional object of this invention is to provide a `pumpwlfiich can `beoperated by rotating 4construction is such that continuous rotation of the rods provides reciprocation ofa plurality of provided in the pump.

Q Andan additional object `of this invention is to l provideja pumpwhichpan be operated by vrotating the sucker rods of the well, and the construction is such that the sucker rods `rotate a tubular drive shaft havingV disposed therein a plurality` ofgrooved spools rotating-simultanewith a plurality of plungers adapted cate during rotation of the spools. `A further object of `this invention is to provide to recipro Va pump which `can be operated by rotating the sucker rods of the well, and the 'construction is such `that ther-sucker rods rotate a tubular drive shaft `having aplurality of simultaneously rotating spools connected to a plurality of` sets of plungers adapted to reciprocate during rotation ofy the shaft, and a set of valves cooperating with eachser,` oi plungers of such construction to allow therethrough.

A further object of this invention is to provide a pump whichcan be operated by rotating the sucker rods oi the well and the construction is `such that the rods may be readily receivedin a recessed driving connection of the pump to assure a better driving engagement and more efficient rotation of the rotor of the pump.

A furtherobject of this invention is to provide sets of plungers or pistons. l l (not. shown) functioning to rotate the rod string.

The surface` structure disclosed in my prior 30y drive shaft, said spools connected posed therein. Y

Fig. 3 is a viewy taken `onlines` 3- 3 of Fig. 2. F.ig, 4 is a fragmentary vertical sectional view taken on lines 4--4 `of Fig. l Fig. 5 is a viewftaken on lines 5-5- of Fig. 1 with-certainparts omitted for clarity. f

` Referring rto the drawngsdin detail, 2` designates a string of casing, 4 a'string of tubing and ploy antifriction 6 the rod string of thewell. Therod string extends from the top of. the `well where it is supported` and driven byfanytsuitable prime` mover Patent No. 2,171,171 is adequate for this purpose.

At various points along the rod string I embearings B (only one of which is shown in Fig.` 2) having radially extending wings Il] adapted to abut against the tubing 4 for centering `therod string and prevent contact with the inner wall of the tubing.v l

The lower end-ofthe tube is providedv with a tubing catcher l 2A of any conventional type which may be set from the` top of the well-in order to anchor and supportthel tubing 4. A sleeve I4 is provided with left hand threads I5 forfreceiving similar threads at the lower end of the tubing string asindicated at I B. The sleeve I4 is provided with exterior threads as shown at 2D for a threaded connection withannular vcollar 22, whichin turn is threadedlyconnected at 24 with an axiallyextending cylindrical member or casing Zt;- Disposed within the cylinder 28 is a tubular drive unit 28 anchored at its ,upper end by roller bearing or race 3l). The tubular unit comprises an upper cylinder 32 and a lower cylinder 33. The upper cylinder 32 has a radially extending Mii'ange 34 for supporting the race 30.

A` cylindrical drive connection 38 is interposed betweenthe cylinders 32 and 33 and is Secured to the lower and upper ends of the cylinders respectively by any conventional means such as welding or the like. The drive connection 38 is provided with a recess 40 of irregular shape in cross section (preferably hexagon) (see Fig. 3) for receiving the lower end of the complementary hexagon shaped rod string 6 for a purpose as will be hereinafter set forth.

As shown in Figs. 1 and 1A, a collar 44 is threaded at 46 to the cylinder 26. A cylindrical housing or casing 48 is threaded at 50 to the collar 44 and extends axially into threaded engagement as shown at 52 with an internal tubular member 54. A lower casing 56 is'threaded at 58 to the tubular member 54 and in turn is provided with internal threads 60 for receiving a bull plug 62 having a nut 64.

Alluding further to the drive unit 28, a collar 66 is secured to the lower end of the tubular shaft 33, and is provided with spaced projecting clutch teeth 68 cooperating with complementary clutch teeth 69 provided on a collar 10. The collar 10 is threaded at 12 to a second drive cylinder or tubular shaft 14 extending through the casing 48, tubular block 54 and lower casing 56. f

The upper end of the drive cylinder 14 is slightly tapered providing a friction tight engagement for a spool 16 disposed thereon. A pin and slot connection 18 prevents rotative movement of the spool on the drive cylinder 14. An anti-friction roller bearing 80 is heldin adjusted position by nut 8| and prevents longitudinal displacement of the spool on the drive cylinder 14. The nut y8| is threaded as shown at 82 to the casing 48.

The spool 16 is provided with an angled groove 83 of substantially spiral shape for a purpose as will be hereinafter set forth. A similar spool 16 is arranged at the tapered lower end of the shaft 14. However, the spiral groove 83 for the lower spool is in an opposite direction to that of the grooveprovided in the spool at the upper endof the shaft. A lower bearing or race V88 and adjusting nut 90 anchors the lower end of shaft 14.

The internal tubular member 54 is provided t:

with a set of bores 92 (preferably 6) (Fig. 5) arranged symmetrically about the axis of the pump. The bores are adapted to receive sets of upper and lower plungers 94 and 96 respectively (preferably six sets or twelve plungers), the construction being such that the plungers in each aligned bore move away from one another to draw liquid into the bores as will be hereinafter set forth. As clearly shown in Figs. 4 and 5,

the tubular member 54 is provided with a second set of bores 98 (preferably 6) arranged symmetrically about the axis of the pump and in spaced relation to the bores 92. An intake ball valve |00 and a discharge ball Valve |02 cooperating with valve seats |04 and |06 respectively are arranged in each of the bores 98. The lower portions of each of the bores 98 are provided lwith a plug 99. The bores are drilled through the lblocks 54 to facilitate removal of the seats |04 and |06. The internal member 54 is provided with a plurality of circumferentially spaced transverse ports ||0 communicating with the valve bores 98, to allow for flow of uid from the well into the pump. Communication between the piston bores and the valve bores is i provided by a plurality of ports l2. For manufacturing simplicity the ports ||2 are formed by drilling radial apertures in the internal tubular member 54 to such a point where each set of bores 92 and bores 98 are brought into communispool.

cation. A plug H6 is inserted in each aperture ||4 to prevent discharge of uid from the member 54.

A connecting rod ||8 is secured to each of the plungers 94 and 96 by a threaded connection as shown at |20. The connecting members ||8 are each formed with a projection |22 engaging a plurality of annular ball bearings or races |24 disposed within the spiral grooves 83 and 83' for the spools 16 and 16 respectively. It will be understood that there is a corresponding number of ball bearing races |24 in the groove of each spool to the number of connecting rods IIB and plungers cooperating with a particular It will be obvious that rotation of the spools 16 and 16 by means of the drive unit 28 and shaft 14 will cause the plungers 94 and 96 to reciprocate.

Operation The pump after being attached to the lower end of the tubing can be run into the well, and at the desired depth the pump may be set by operation of the tubing catcher |2. The rods are then run into the tubing and the lower section of the rod string is received in the recess 40 of the member 38 to provide a driving connection with the drive unit 28. The rods are then caused to rotate by the source of motive power at the surface of the well (not shown) with a simultaneous rotation of the hollow shafts 33, 14 and spools 16 and 16. It will be understood that the pump is prevented from rotation by the tubing catcher. As the spools 16 and 16 rotate, a set of opposed plungers 94 and 96 in one instance will be moved away from one another to draw fluid through a port |I0, intake valve |00, port ||2 and into a respective cylinder 92. Due to the spiral configuration of the grooves 83 and 83', continued rotation of the spools causes the set of plungers to be moved toward one another to force oil from the bore 92 through the discharge valve |02 into the chamber |26. It will be understood that the intake valve |00 is closed during this latter operation. The fluid discharge will pass through apertures |28 into 'the hollow shafts 14 and 33 to be discharged through apertures |30 provided in cylinder 33, into chamber |32, then through apertures 36 upward through cylinder 32, collar |4 and travel up the tubing to the top of the well. It will be apparent that the arrangement of the intake and discharge valves is such to allow free discharge of iiuid therethrough. This is advantageous in a natural flowing well having suiicient bottom hole pressure to lift the oil up the tubing in conjunction with the pump. A plurality of spaced apertures |34 are provided near the lower portion of shaft 14 in deiinite relation to apertures |28, assuring proper assembly of shaft 14 regardless of which end is inserted first, thus providing an outlet for discharge chamber |26. The apertures |34 also allow for flow of lubricant oil to adjacent rotating parts.

This invention employs small plungers, preferably one half inch in diameter having slight clearance so that no packing is needed and sand can not get between the piston and its bore. It will be understood that the grooves 83 and 83' are formed so that a set of plungers come together vat the same time and provide a one inch stroke. The construction is such that in case a valve should become inoperative, only two plungers will stop pumping.

It will be observed that the construction provides a multipleplunger pump secured to the lower end of a tubing catcher with left lhand threads, and as the tube is anchored to the casing, rotation of theldrive shafts of the pump will Y f ed (for increasing production) by merely unthreading the nut 64 of plug 62 to allow engagement ofthe additional unit with the clutch teeth B9 of the shaft 14. l l, 'l

Changes may be made' inthe combination and arrangement of parts as heretofore set forth in the specification and shown in therdrawings, it being understood that any modications in the precise embodiment of the invention may be made Within the scope of the following claims `without departing from the spirit of the inven-y tion. i

What I claim is: l'

1. A deep well pump comprising a tubular cylinder having a lplurality of longitudinallyv arranged plunger bores, reciprocating,plungerslop* erating` in the bores, a plurality `of valve bores arranged in the cylinder in spaced relation on to `the plunger bores, a combination intake and .dis- `charge valve structure arranged in the valve bores, means providing communication between the plunger bores Yand the valve bores, inlet means yprovided in the outer periphery yof the cylinder and communicating with the Vvalve bores, rotatable driving means extending through the cylinder and having upper and lower spools arranged thereon, a spiral shaped groove foreach of the spools arranged in` opposite directions to each other, a plurality of ballbearings arranged in each of the spool grooves, vand means connectedatthe outer ends of each of the plungers and cooperating with the ball bearings for causing reciprocation of the of the driving means.

2. A deep well pump `comprising a tubular cylplungers due to rotation vinder having a plurality of longitudinally arerating inthe bores, a pluralityof valve bores arranged in the cylinder in spaced relation to the plunger bores, a 'combination intake and discharge valve structure arranged in the valve bores, means `providing communication. between the` plunger bores .and the valve bores, inlet `means provided in the `outer periphery of the cylinder and communicating with the valve bores,`

rotatable driving means extending through the cylinder and having upper and lower spools ari ranged thereon, a spiral shaped groove for each each other,

of the spools arranged in opposite directions to a plurality of roller bearings arranged in each of the spool grooves, means connecting at outer ends of each of the plungers and bearings for causing cooperating with the roller reciprocationof the plungers due to rotation of the driving means, said driving means being of tubular form and provided with means placing its interior in communication' with the valve bores whereby the driving means functions as a conduit for the pumped liquid.

3. A deep Well pump comprising a tubular cylinder having a plurality of longitudinally arranged piston bores, a plurality of valve bores arranged in spaced relation to the piston bores, a combination intake and bore, means providing communication between the piston bores and the inlet ports provided in the cylinder and communicating with the valve bores, rotatable driving means extending through the cylinder `and having upper and lower spools secured thereto, afspiral groove for each spool arranged in opposite directions to each other, re` ciprocating pistons operating'in the piston bores,

freely rotatable `means arranged in the spiral grooves of the spools, and means secured at the outer ends of the pistons to operatively engage the freely rotatable means forcausing reciprocation of the pistons due to rotation 0f the driving means, said driving means having two sets of apertures providing communication between the interior of the driving 'means and the valve bores, said sets arranged in definite spaced relation to each other to assureproper assembly of the driving means.

WALTER BRAUER.

rangedplunger bores, reciprocating plungers opdischarge valve struclture arranged in the-valve 

